KR20010001798A - Apparatus and method for selecting car audio mode automatically - Google Patents

Abstract

PURPOSE: An apparatus and a method for selecting an auto mode of a car audio system is provided to switch automatically a current mode to an auto mode without a key operation. CONSTITUTION: An apparatus and a method for selecting an auto mode of a car audio system comprises an antenna portion(1), an FM tuner portion(2), an FM intermediate frequency processing portion(3), a multiplexing portion(4), an AM tuner portion(5), an AM intermediate frequency processing portion(6), a player portion(7), a switch and volume portion(8), an amplification portion(9), a speaker portion(10), a micro computer(11), a display portion(12), and a key(13). The antenna portion(1) outputs a sensed radio wave. The FM tuner portion(2) selects a desired broadcasting. The FM intermediate frequency processing portion(3) processes an intermediate frequency of the selected broadcasting. The multiplexing portion(4) senses a stereo of the FM broadcasting. The AM tuner portion(5) selects a desired AM broadcasting. The AM intermediate frequency processing portion(6) processes an intermediate frequency of the selected broadcasting. The player portion(7) operates a CD or a tape. The switch and volume portion(8) switches a mode. The amplification portion(9) amplifies a signal from the switch and volume portion(8). The speaker portion(10) outputs the amplified signal. The micro computer(11) controls a mode switching operation. The display portion(12) displays an operating status of an audio. The key(13) provides an instrument for operating the mode.

Description

APPARATUS AND METHOD FOR SELECTING CAR AUDIO MODE AUTOMATICALLY}

The present invention relates to an automatic mode selection device and method of car audio, in particular, automatic mode selection of car audio that automatically changes the reception mode when the electric field strength is lowered below a certain level and maintained for a predetermined time without a driver's key operation. An apparatus and method are provided.

As shown in FIG. 1, in the conventional car audio, the antenna unit 100 detects radio waves floating in the air; An FM tuner unit 200 for selecting only a desired broadcast from among the frequencies detected by the antenna unit 100; An FM intermediate frequency processor 300 for processing an intermediate frequency of the broadcast selected by the FM tuner 200; A multiplexer 400 for sensing stereo of an FM broadcast; An AM tuner unit 500 for selecting a desired broadcast from among a plurality of AM broadcasts; An AM intermediate frequency processor 600 for processing an intermediate frequency of the broadcast selected by the AM tuner 500; A player 700 capable of operating a tape or CD; A volume unit 800 for controlling signals applied from the FM intermediate frequency processor 300, the multiplexer 400, the AM intermediate frequency processor 600, and the player 700; An amplifier 900 for amplifying the input signal; A speaker unit 1000 which is a final output terminal for allowing a user to hear the signal output from the amplifier 900; A microcomputer 1100 for controlling a program to increase user convenience; A display unit 1200 for displaying the operation state of the audio of the vehicle so as to be seen by the eye; It is composed of a key 1300 that provides a tool for the driver to operate for switching the operation mode of the audio.

In the general audio structure configured as described above, in order for the driver to switch the reception mode to tape, CD or radio, the driver switches the reception mode by operating the mode switching key of the audio, and enables automatic mode switching by a predetermined time reservation.

However, in the above-described conventional mode and apparatus for selecting car audio, when a radio wave passes through an area where radio waves are weak while driving, the noise is severely generated and reaches a state where radio reception is almost impossible. It is not possible to receive a good sound quality broadcast and the driver has to change the reception mode by operating the mode switch key of audio in order to switch the reception mode to tape or CD mode. There was this.

Therefore, the present invention has been made to solve the conventional problems as described above, the object of the present invention is to change the reception mode automatically when the electric field strength is lowered below a certain level and maintained for a predetermined time without the operator's key operation, Car audio automatic mode selector and method to prevent noise reception and to continuously measure the electric field strength of the radio even after switching the reception mode and to switch back to the radio mode to listen to the original broadcast when it goes above the reference level. To provide.

In order to achieve the above object, the automatic mode selection apparatus of the car audio of the present invention includes: an antenna unit (1) for detecting radio waves floating in the air and outputting detected radio waves; An FM tuner unit (2) which selects only a desired broadcast from among the frequencies detected by the antenna unit (1); An FM intermediate frequency processor (3) for processing an intermediate frequency of the broadcast selected by the FM tuner (2); A multiplexer 4 for sensing stereo of an FM broadcast; An AM tuner unit 5 for selecting a desired broadcast from among a plurality of AM broadcasts; An AM intermediate frequency processor (6) for processing an intermediate frequency of the broadcast selected by the AM tuner (5); A player unit 7 for operating the tape or CD; A switch and volume unit 8 for controlling signals applied from the FM intermediate frequency processor 3, the multiplexer 4, the AM intermediate frequency processor 6, and the player unit 7 and switching modes by receiving a switching signal. )Wow; An amplifier 9 for amplifying the signal output from the switch and the volume unit 8; A speaker unit 10 for allowing a user to hear the signal output from the amplifier 9; Measure the voltage value of the S-meter and switch the car audio from radio mode to other mode when the voltage value of the S-meter drops below the reference value, and move the car audio from other mode to radio mode if the voltage value of the S-meter becomes higher than the reference value. A microcomputer 11 for outputting a signal to switch to the switch and the volume unit 8; A display unit 12 which displays an operation state of audio of the vehicle so as to be visible; Characterized in that it consists of a key 13 to provide a tool for the driver to operate for switching the operation mode of the audio.

In addition, the automatic mode selection method of the car audio according to the present invention checks whether the car audio mode is a radio mode, repeats this step if the radio mode is not a radio mode, and proceeds to the second step if the radio mode is a radio mode. Wow; A second step of measuring a voltage value of the S-meter; Performing the second step again when the voltage value measured in the second step is equal to or greater than the reference value, and proceeding to the fourth step when the voltage value measured in the second step is less than the reference value; A fourth step of switching the mode of the car audio from the radio mode to the tape or CD mode; A fifth step of measuring a voltage value of the S-meter; Performing the fifth step again when the voltage value measured in the fifth step is less than the reference value, and proceeding to the seventh step when the voltage value measured in the fifth step is greater than or equal to the reference value; And a seventh step of switching the car audio mode from the tape or the CD mode to the radio mode.

1 is a functional block diagram showing a configuration of a conventional general car audio;

2 is a functional block diagram showing a configuration of car audio having an automatic mode selection device for car audio according to an embodiment of the present invention;

3 is an operation flow chart illustrating a method of automatically selecting car audio according to an embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

1: antenna unit 2: FM tuner unit

3: FM intermediate frequency processing unit 4: multiplexing unit

5: AM tuner unit 6: AM intermediate frequency processor

7: Player unit 8: Switch and volume unit

9: amplification unit 10: speaker unit

11: microcomputer 12: display unit

13: KEY 100: Antenna

200: FM tuner unit 300: FM intermediate frequency processing unit

400: multiplexer 500: AM tuner

600: AM intermediate frequency processing unit 700: player unit

800: volume section 900: amplification section

1000: speaker 1100: microcomputer

1200: display unit 1300: KEY

Hereinafter, an apparatus and a method for automatic mode selection of car audio according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a functional block diagram showing the configuration of the automatic mode selection device for car audio according to an embodiment of the present invention, the car audio is equipped with an automatic mode selection device for car audio according to an embodiment of the present invention, the antenna Section (1), FM tuner section (2), FM intermediate frequency processing section (3), multiplexing section (4), AM tuner section (5), AM intermediate frequency processing section (6), player section (7), It consists of a switch and a volume part 8, the amplifier part 9, the speaker part 10, the microcomputer 11, the display part 12, and the KEY 13.

The antenna unit 1 detects radio waves floating in the air and sends the detected radio waves to the FM tuner unit 2 and the AM tuner unit 5 to be described later.

On the other hand, the FM tuner (Tunner) 2 serves to select only the desired broadcast from the various frequencies detected by the antenna unit (1).

In addition, the FM intermediate frequency processing unit 3 serves to process the intermediate frequency of the broadcast selected by the FM tuner 2 and apply a signal to the switch and volume unit 8 described later.

On the other hand, the multiplexer 4 detects the stereo of the FM broadcast and serves to apply a signal to the switch and volume unit 8 to be described later.

In addition, the AM tuner unit 5 plays a role of selecting a desired broadcast from among a plurality of broadcasts.

Meanwhile, the AM intermediate frequency processor 6 processes the intermediate frequency of the broadcast selected by the AM tuner 5 and applies a signal to the switch and volume unit 8 described later.

In addition, the player unit 7 serves to operate a tape or CD and to apply a signal to the switch and volume unit 8 described later.

Meanwhile, the switch and the volume unit 8 control signals applied from the FM intermediate frequency processor 3, the multiplexer 4, the AM intermediate frequency processor 6, and the player unit 7, and an amplifier to be described later. A signal is outputted to (9), and receives a mode switching signal from the microcomputer 11 to be described later.

In addition, the amplifier 9 amplifies the signal output from the switch and volume unit 8 and serves to output a signal to the speaker unit 10 to be described later.

On the other hand, the speaker unit 10 serves as a final output terminal for the user to listen to the signal output from the amplifier (9).

In addition, the microcomputer 11 is a terminal that changes according to the intensity of radio waves during radio reception, and measures the voltage value of the S-meter that changes to a high voltage when the electric field strength is high and changes to a low voltage when the electric field strength is low, thereby measuring the voltage of the S-meter. If the value is lower than the reference value, the signal for switching the car audio from the radio mode to the other mode is output to the switch and the volume unit 8, and if the voltage value of the S-meter becomes higher than the reference value, the car audio is transmitted from the radio mode in the other mode. It serves to output a signal to switch to the mode to the switch and the volume unit (8).

On the other hand, the display unit 12 serves to display the operation state of the audio of the vehicle to the eye.

In addition, the KEY 13 serves to provide a tool for the driver to operate to switch the operation mode of the audio.

Next, the automatic mode selection method of the car audio equipped with the automatic mode selection device of the car audio having the above configuration will be described.

3 is an operation flow chart illustrating a method for automatically selecting a car audio according to an embodiment of the present invention, where S represents a step.

First, the microcomputer 11 checks whether the mode of the car audio is a radio mode and repeats the present step if the radio mode is not the radio mode.

Since the. The microcomputer 11 measures the voltage value of the S-meter (S2).

Then, when the voltage value measured in the second step is greater than or equal to the reference value, the microcomputer 11 performs the second step again, and when the voltage value measured in the second step is less than the reference value, the following fourth step Proceed to (S3).

Thereafter, the microcomputer 11 outputs a signal to the switch and volume unit 8 to switch the mode of the car audio from the radio mode to the tape or CD mode, and the switch and volume unit 8 inputs the signal. The car audio mode is switched from the radio mode to the tape or the CD mode (S4).

Thereafter, the microcomputer 11 continuously measures the voltage value of the S-meter of the radio while playing the switched mode while switching to the tape or CD mode (S5).

Subsequently, when the voltage value measured in the fifth step is less than the reference value, the microcomputer 11 performs the fifth step again, and when the voltage value measured in the fifth step is equal to or greater than the reference value, the electric field state is good. The determination proceeds to the following seventh step (S6).

Then, the microcomputer 11 outputs a signal to the switch and volume unit 8 to switch the car audio mode from the tape or CD mode to the radio mode, and the switch and volume unit 8 inputs the signal. The car audio mode is switched from the tape or the CD mode to the radio mode (S7).

As described above, according to the apparatus and method for automatic mode selection of car audio according to the present invention, when the electric field strength is lowered below a certain level and maintained for a predetermined time or more, the reception mode is automatically changed to prevent noise reception and the reception mode. After switching, it continuously measures the electric field strength of the radio and goes over the reference level so that it switches back to the radio mode and listens to the original broadcast. It is an excellent effect that it can automatically escape from and continue to receive good quality broadcasts.

Claims (2)

An antenna unit 1 for detecting radio waves floating in the air and outputting detected radio waves; An FM tuner unit (2) which selects only a desired broadcast from among the frequencies detected by the antenna unit (1); An FM intermediate frequency processor (3) for processing an intermediate frequency of the broadcast selected by the FM tuner (2); A multiplexer 4 for sensing stereo of an FM broadcast; An AM tuner unit 5 for selecting a desired broadcast from among a plurality of AM broadcasts; An AM intermediate frequency processor (6) for processing an intermediate frequency of the broadcast selected by the AM tuner (5); A player unit 7 for operating the tape or CD; A switch and volume unit 8 for controlling signals applied from the FM intermediate frequency processor 3, the multiplexer 4, the AM intermediate frequency processor 6, and the player unit 7 and switching modes by receiving a switching signal. )Wow; An amplifier 9 for amplifying the signal output from the switch and the volume unit 8; A speaker unit 10 for allowing a user to hear the signal output from the amplifier 9; Measure the voltage value of the S-meter and switch the car audio from radio mode to other mode when the voltage value of the S-meter drops below the reference value, and move the car audio from other mode to radio mode if the voltage value of the S-meter becomes higher than the reference value. A microcomputer 11 for outputting a signal to switch to the switch and the volume unit 8; A display unit 12 which displays an operation state of audio of the vehicle so as to be visible; An automatic mode selection device for car audio, comprising a key (13) for providing a tool for allowing a driver to operate an audio mode. A first step of checking whether the car audio mode is the radio mode and repeating this step if the radio mode is not the radio mode, and proceeding to the second step if the radio mode is the radio mode; A second step of measuring a voltage value of the S-meter; Performing the second step again when the voltage value measured in the second step is equal to or greater than the reference value, and proceeding to the fourth step when the voltage value measured in the second step is less than the reference value; A fourth step of switching the mode of the car audio from the radio mode to the tape or CD mode; A fifth step of measuring a voltage value of the S-meter; Performing the fifth step again when the voltage value measured in the fifth step is less than the reference value, and proceeding to the seventh step when the voltage value measured in the fifth step is greater than or equal to the reference value; And a seventh step of changing the mode of the car audio from the tape or the CD mode to the radio mode.